Stropping-machine.



M. S. SLENKER.

STROPPlNG MACHINE.

YAPPLIQATION FILED NOV. 6. 1915.

1,188,687. Patented June 27, 1916.

.Figl.

Inf/anion M. S. Stan/ e21 NITED STATES PATENT OFFICE.

-Mano s. sL-ENKER, or SAN FRANCISCO, canrroralvm.

. STROPPING-MACHIN To all whom z'tmay concern p I Be it known that I, MANO S. SLENKER, a

citizen of the United States, residing at San. Francisco, in the county of San Francisco and Stateof California, have invented new and useful Improvements in Stropping-Machines, of which the following is a specification. 8

. The object of the present invention is to provide an improved machine for stropping suitable base on the front and rear ends of.

which are erected yoke-shaped standards 2, in the sides of which are bearings for the ends of parallel shafts 3, carrying cylinders Specification of Letters Patent.

4 on which are secured hollow adjacent cylinders 5 of leather, each cylinder'having a longitudmal series of transverse clrcular flanges or rings 6 and grooves 7 between the rings. The cylinders are so arranged onthe shafts. that the rings of each cylinder are opposite to the grooves 7 ofthe opposite cylinder. Having its ends secured in the upper portions of the yokes is a bar 8 from which depend slidable hangers 9, to which are secured, by screws 11 and thumb nuts 12, clamping plates 13 between which 'a razor blade 14 can be clamped. Secured to, and extending forwardly from, the front hanger 9 is a fork-shaped arm 16, in which is pivoted, as shown at 17, one end of a pitman 18, the other end of which is pivoted on a shaft 19 extending eccentrically through the bottoms 21 of cup-shaped crown Wheels 22 the teeth 23 of which mesh with the teeth of pinions 24' secured upon the forward ends of the shafts 3. Said crown wheels are cen trally secured to square shafts 26, having rounded portions 27, which rotate in bearings 28 supported by brackets 29 secured to inserted between the clamping plates in the} proper position so that its lower edge extends between the circular leather rings 6 of Patented June 27', 1916. Application filed November 6, 1915. Serial No. 59,979. i

the two series, and the thumb nuts being screwed up so as to clamp the razor in said position, the crank handle is rotated, which produces a rotary motion in opposite directions of the-two series of rings, and at the same time produces a longitudinal 'motion of the razor blade between the rings. By this means a very efiective abrasive action is caused, thus producing a sharp edge on the razor blade. I

The advantages of the apparatus are the ease and convenience of operati'on, and the simplicity and economy of construction.

I claim The combination of a base, standards thereon, shafts having bearings in said standards, abrasive cylinders and pinions on said shafts, two outwardly facing cupshaped crown wheels meshing with said pinions, bothv rotatable about the same axis but on different shafts transverse to said shafts,- a guide secured to said standards, means slidable on said guide for securing a cutting instrument, a shaft extending eccentrically through the bottoms of said crown wheels, and a pitman, of which one end is connected to said last-named shaft and the other is connected to said means whereby a longitudinally reciprocating movement is imparted to said means with the rotation of said crown wheels.

' In testimony whereof I have hereunto set F. M/WRIGHT, D. B. RICHARDS. 

